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1990 GMC 1500 Pickup Question: Cranks but will not start



, 5.0L V8, Bellingham, WA, February 26, 2011, 13:07

Moved vehicle out of carport,ran fine.After about 2 hrs would not start.Timing is right on,even changed timing chain and cam gear.Plugs are not wet,constantgood fire to plugs.Cranks fine and feels like it will almost start.This has a throttle body,Canadian model with usa emmision standards.

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  • Answer #1

    March 02, 2011, 19:24

    I'm suspicious of a failing fuel pump. Safely check your fuel pressure

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    , March 02, 2011, 21:19

    It should start for a bit if spraying quick start,but it does not.I relpaced the sending unit last summer and the fuel pump tested fine.Now i'am thinking a possible short in the throttle body injectors or wiring or that the starter itself not turning the engine fast enough.
    Thank You.

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